P
.O. BOX 190409 • ANCHORAGE, ALASKA 99519-0409

INTRODUCTION PHONE (907) 344-1755

IliST.ALLA!'ION IllSTRUCTIOHS HO. 3233-I FOR MODIFIED PIPER WDIG LIFT STRUTS S
.T.C. No. SA4635NM February 1, 1991 Page 1 of 3

The Piper wing lift struts whose installation is approved by F. Atlee Dodge AircraftServices, Inc. S.T.C. No. SA4635NM have been modified as follows to accomplish the purposes described: (1) Avisual inspection of the wing lift strut interiors has been performed and the struts have been repaired or replaced as necessary. The protective treatment specified by AD 77
-03

-08, Paragraph (a), has been applied in order to impede corrosion of the strut interiors, and both ends of the struts have been hermetically sealed perS.T.C. No
.·SA4635NM in order to prevent moisture from entering the struts. (2) Heavy
-duty lift strut forks, jam nuts, and barrel assemblies have been installedper the applicable Jensen Aircraft S.T
.C. (see Table 1 on Page 3) and "NO STEP" placards have been affixed to the struts perS.T.C
. No. SA4635NM, in order toprevent bending and/or cracking of the lift strut forks. The "NO STEP" placards are required by Paragraph (c) ofAD 81-25-05.
LIFT STRUT INSTALLATION INSTRUCTIONS These **ins~allation** instructions apply only to wing lift struts modified by F. Atlee Dodge Aircraft Services, Inc. or by Jensen Aircraft perF. Atlee Dodge S.T.C. No. SA4635N}1. Lift struts so modified are identified by a data plate, tack welded to the upper end of each strut, inscribed with the name "F. Atlee Dodge" and the date modified
. Atag is attached to each modified lift s1:rut shipped, specifying whether or not the modifier was able to adjust the fork to preserve the original strut leng1:h. In cases where the original stru1: length
was unknown, or otherwise could not be preserved, the modifier has adjusted the fork so that approximately half the threaded portion of the shank is within the barrel. Each modified lift strut is shipped with the fork jam nut torqued to40 foot-pounds, to preserve the fork **adjustmen~** and the strut hermetic seal during shipping and storage. (1) Remove all shipping tags and install each modified lift strut en the airplane in its proper loca'tion, with the "NO STEP" placard facing upward
so it can be read by persons entering and exiting the airplane. All lift stru1: attaching har dware other than the heavy-duty fork and its jam nut, must be identical to that originally specified for the airplane. The fork jam nut may have to be loosened during installation in order to

- . --·- . **~** •• ,,.. ........ A OQ/"'OI\C"I" CAf:lT<; • FUELT

**~NKS** • A/CSKIS • ANOMISCELLANEOUSOTHERA/C PARTS

### F. Atlee Dodge Aircraft Services, Inc. P
.O • .Box 190409 Anchorage, Alaska 99519-0409

MAINTENANCE AND INSPECTION INSTRUCTIONS )233-I February 1 , 1991 l?age ) 

### of3

The installation of li1't struts modii'ied per F. Atlee Dodge Aircraft Services S.T.C. No. SA4635Nl1 does not in any way diminish the responsibility of the airplane owner and the mechanic for exercisingdue care in**~he** 

### maintenance and inspection of each modified lift strut, fork, jam nut, and barrel assembly
. These components must be properly inspected and maintained to remain in airworthy condition, as must any aircra£t**pa~.** 

### Lift struts must be maintained and inspected in

### accordance w ithPiperAircraft Corporation Service Bulletin No. 528C dated October 11, 1989, or No. 910A dated October 10, 1989, as applicable, and must be inspected as required by AD 77-03-08 as amended effective July 31, 1978. If any corrosion is found on a li£t strut fork, it must be replaced. Any failure of a modified lift strut, fork, jamnut, and/or barrel assembly must be reported to your local FAA Flight StandarnsDistrict Office or Flight Standards Field Office, and to the lift strutmodifier.

Piper Model PA-12 PA-14 PA-16 PA-18 

### PA-20 PA-2.2 

### PiperRigging Service Hemo Humber 

## a 9 18 

### 19 20 20 & 21 

### TABLE 1 Jensen Aircraft

S.T.C
. Number SA1583Nl>1 SA1584NH SA1590Nr1 SA1585NM SA1586NM SA1587N!1 F
. Atlee Dodge S.T.C. Number SA4635NM SA4635NM SA4635NI·1 SA4635NI1 SA4635NH SA4635NM